Blow-pipe



E. W. EMERTON.

Blow-Pipe.

,326. Patented Jan. 6,1880.

jay-enfer.

`UNITE STATES PATENT OFFICE.

EDWARD W. EMERTON, OF WEST MERIDEN, CONNECTICUT.

BLOW-PIPE.

SPECIFICATION forming part of Letters Patent No. 223,326, dated January 6, 1880.

Application led October 20, 1879.

To all whom it may concern Be it known that I, EDWARD W. EMEETON, of West Meriden, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Blow- I ipes5 and I do heleby declare that the followin gis a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure l is a side elevation of a blow-pipe embodying my improvement. Fig. 2 is a longitudinal section of the same; and Fig. 3 is a cross-section on line x w, Fig. l, showing the construction and arrangement of the gas-valve with its adjuncts.

Similar letters ot' reference indicate corresponding parts in all the figures.

This invention has relation to that class of blow-pipes which are used with gas or hydrocarbon tlames for the purpose ot' intensifying their heat by a forced supply ot oxygen to the flame; and it consists in the construction and arrangement ot' parts ot' a blow-pipe, for solderers, braziers, or tinners7 use, which is provided-with a burner from which the gas is shut i off automatically without affecting the air-current when the apparatus is not in actual use, substantially as and for the purpose hereinafter more fully set forth.

In the annexed drawings, A is a tube or pipe, which may he of any suitable size and shape. Inserted centrally through this pipe is a smaller tube, B, which opens out at its rear end at b, where it has a corrugated neck to receive a flexible rubber tube. Theouter pipe, A., branches off at a, and is likewise provided with a corrugated neck to receive exible tubing. A is the gas-pipe, and B the air-pipe, their tleXible connecting-tubes leading to the stationary pipe and blower or air-reservoir, respectively.

The gas-pipe a, where it enters the main pipe A, passes to one side of the inner air pipe or duct, B, and opens up into a valve-chamber, C, which is sealed by a iiexihle diaphragm, c, through the center of which is inserted a valvestem, d, which is encircled by a coiled spring, e, placed within the valve-box D, through the top of which the valve-stem d projects.

E is a lever, having its fulcrum in a bearing, e', affixed upon pipe A, and with its upwardlycurved rear end inserted into a slot, e, in the head otl the valve-stem d, bearing against a friction-roller pivoted in said head. The other long arm of lever ll is tlattened so as to form a convenient gripe or handle Haring outwardly from the pipe, and is provided with a set-screw, E', for the purpose hereinafter stated.

F is the head or burner, which consists simply of an enlargement at the top or end of the gas-pipe A, surrounding and projecting up above the mouth ot" the central air-pipe, B. Outside of the burner, but impinging closely against it, is a small tube, Gr, which is continued through the gas-tube A, as shown at g, down to its branch a, below valve-chamber C, so that the valve o will not operate to cut o' the supply of gas from said branch a to pipe G.

From the foregoing description, taken in' connection with the drawings, the operation ot' my invention will be readily understood. Every time the solderer lets go his hold upon the pipe spring c, operating against valve c, will close the valve-chamber C and shut oft the gas, except a small stream, which finds its way through the tine tube G, and forms a tiny jet at its mouth to one side of the burner F. VV-hen he takes up the pipe, grasping it with the right hand across the long arm of lever E, that end of the lever is depressed and the valve is opened, allowing the gas to iiow through pipe A till it reaches the burner-head F,where it is ignited by the tiny jet at the mouth of the igniting pipe or duct Gr. Thus all loss of gas is absolutely avoided, amounting to a saving of from thirty to sixty per cent., as, with the.

blow-pipes ot' this class as ordinarily constructed, the gas is kept burning with full force duiin g the intervals the workman changes his position or his work, or leaves his bench to get new work, or tor other purposes.

The size of the jet may be regulated by adjustingthe set-screw E', which limits the play ot' the lever E and valve-stem d with its valve c.

Another important advantage of this construction is that there is a constant ilow of cold air through the pipe during the intervals when the gas is shut olf, which cools the work and hardens the solder the moment the flame is withdrawn by letting go lever E.

IOO

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States- 1. The combination, with a blow-pipe consisting of an inner air-duct and outer envelopin g gas-duct, of a valve and lever arrangement for shutting oft' automatically the flow of gas through the gas-duct without disturbil'lg` the flow of air through its duct, substantially as and l'or the purpose herein shown and de scribed.

2. The combination7 with a blow-pipe consisting of an inner air-duct and outer enveloping gas-duct, and provided with means for shutting oft automatically the liow of gas through its duet when the implement is not in actual use, of an auxiliary ignition gas-duct which is not affected by the valve for shutting oft the tiow of gas through the main duct, substantially as and for the purpose herein shown and set forth. Y

3. The combination of the outer gas-pipe, A, having burner F and branch pipe a, auxiliary independent gas -duct G, inner airduct, B, valve-chamber l, and valve c, provided with the stein d, spring e, and operating-lever E, hay'ing set-screw E', substantially as and for the purpose herein shown and specilied.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in 3o presence of two Witnesses.

EDI/VARI) W. EMERTON.

Witnesses -WILLIAM M ARSHALL. OSWALD WooDWARD. 

